EP 0255689 B1 19911121 - PROCESS FOR THE PREPARATION OF 1-HYDROXY-2-PYRIDINONES
Title (en)
PROCESS FOR THE PREPARATION OF 1-HYDROXY-2-PYRIDINONES
Publication
Application
Priority
DE 3626210 A 19860802
Abstract (en)
[origin: US4916228A] 1-Hydroxy-2-pyridones of the formula I <IMAGE> (I) in which R1=an organic radical and R2=H or an organic radical, are prepared by reacting a pyrone of the formula II <IMAGE> (II) in which R1 and R2 have the same meaning as in formula I, with a hydroxylammonium salt in the presence of at least one alkali metal carbonate and/or hydrogen carbonate. The compounds of the formula I have a biological activity-in particular an antibacterial and antimycotic activity.
IPC 1-7
IPC 8 full level
C07D 213/89 (2006.01)
CPC (source: EP US)
C07D 213/89 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
US 4916228 A 19900410; AT E69604 T1 19911215; DE 3626210 C1 19871001; DE 3774636 D1 19920102; EP 0255689 A2 19880210; EP 0255689 A3 19890104; EP 0255689 B1 19911121; ES 2039218 T3 19930916; GR 3003576 T3 19930316; JP H0745474 B2 19950517; JP S6341462 A 19880222
DOCDB simple family (application)
US 8008587 A 19870731; AT 87110959 T 19870729; DE 3626210 A 19860802; DE 3774636 T 19870729; EP 87110959 A 19870729; ES 87110959 T 19870729; GR 910402038 T 19920115; JP 19054387 A 19870731